Piedmont region sedimentary facies belt distribution scope prediction method

Abstract

The invention provides a piedmont region sedimentary facies belt distribution scope prediction method. The method comprises steps that according to a field outcrop section identification sedimentary facies type of a research region, measurement points are selected, and a distance between each measurement point and an object source is measured; actual thickness of each rock stratum of a stratum corresponding to each measurement point and actual thickness of the stratum corresponding to the measurement point are calculated; according to the acquired thickness of the stratum corresponding to each measurement point and actual thickness of each sandy conglomerate stratum of the stratum, and a sand-to-stratum ratio of each measurement point is calculated; according to the distance between each measurement point and the object source and the sand-to-stratum ratio data corresponding to the measurement points, the function relationship between the sand-to-stratum ratio and the distances away from the object source is established; according to the function relationship between a sand-to-stratum ratio and the distance away from the object source of to-be-predicted sedimentary facies, a sedimentary facies belt distribution scope is predicted. The method is advantaged in that based on field outcrop sand-to-stratum ratio analysis, an extension distance of the piedmont region sedimentary facies belt can be accurately determined, and the sedimentary facies belt distribution scope can be accurately predicted.

Description

Technical field [0001] The invention belongs to the technical field of petroleum and natural gas exploration and development, and in particular relates to a method for predicting the distribution range of sedimentary facies belts in piedmont areas. Background technique [0002] Sedimentary facies belt refers to the synthesis of all sedimentary rocks formed in a certain depositional environment. Favorable sedimentary facies belts are an important condition for controlling large-scale accumulation of oil and gas. The distribution law of sedimentary facies belts is an important factor restricting the process of oil and gas exploration. Sedimentary facies belts The extension distance of can well reflect the plane distribution of the sedimentary facies belt. [0003] At present, the piedmont area of ​​the squeeze basin is an important oil and gas exploration area in western my country. Determining the extension of the sedimentary facies belt in the piedmont area can effectively predict ...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the above-mentioned technical problem of inaccurate prediction method for the distribution range of sedimentary facies in the piedmont region, and proposes a method for predicting the distribution range of sedimentary facies in the piedmont region, which can accurately determine The extension distance of sedimentary facies belts in the piedmont area, and then accurately predict the distribution range of sedimentary facies belts

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